Has anyone tried this 8L90-E Fix

[2016Dom]

General Motors 8-Speed Billet Valve Body Upgrade Kit w/ PulseDelete™ (Lifetime Warranty)

#1 Valve Body Upgrade Kit for the General Motors 8-Speed Transmission. Engineered & Manufactured in the USA by Next Gen Drivetrain, Inc. Lifetime Warranty.

nextgendiesel.com

Project Carbon® General Motors 8-Speed Billet Valve Body Upgrade Kit​

 

[Fless]

@jfoj has used something like this for a 10-speed:

Project Carbon Next Gen 10 Speed Valve Body Kit - Finally Installed!

Just putting this initial info out about the Project Carbon Next Gen 10 Speed Valve body kit for anyone that wants to follow along. I contacted Next Gen and spoke at length with the design Engineer that came up with the Project Carbon valve body repair/update. Spoke about many topics but it...

www.tahoeyukonforum.com

 

[2016Dom]

With no reviews that i can find, I bit the bullet and order one.

Right now transmission 2 1 shift seams late as in when i leave from a stop there is a delay, like it is in 2nd then finds 1st and then goes, shutter at cruse and some odd shifting.

Will report latter.

 

[2016Dom]

The in stall went well, very strait forward.
The pan cam off with out messing with the cross over pipe. I followed a video on u-tube.
I was very surprised how little clutch material was in the pan. My guess is the tranny has been serviced before I purchased it.
By the looks of the pulse dampeners pistons (no ware) the valve body had work on it as well.
I can tell it is shifting a little better, but I am still in the break-in period.

 

[2016Dom]

I followed this to get better longevity from my transmission as well. U-tube video

GM 8 Speed | Transmission Tuning Tutorial​

I still have the 2 1 shift delay.

I think it has something to do with my speedometer is delayed coming to a stop and the tune has 3 2 and 2 1 shifts at the same speed.
I changed that in the tune and when testing I noticed the speedometer delay.

 

[KGuard]

Is there an update on this effort? I am considering this option to finally end the issues with my 2018 Colorado with the 8L45.